Prática EPA 608

A technician needs to pressurize a repaired system to check for leaks. The truck carries a nitrogen cylinder, an oxygen cylinder from the torch set, and a shop air compressor. Which setup is correct?

• AShop compressed air, because it is free and is mostly nitrogen anyway
• BOxygen through the torch regulator, because it is already set to a known pressure
• CNitrogen straight from the cylinder valve, opened slowly to limit the pressure
• DNitrogen through a pressure regulator, with a relief valve in the line